Instruction manual

Instruction Manual
760006-A
September 2001
2-2 Installation Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 Platform
2-3 ELECTRICAL REQUIREMENTS
The NGA 2000 Series Platform and Multi-
Module Power Supplies can operate on any
AC line voltage between 85 and 134 VAC,
and between 218 and 264 VAC and the
Platform and Analyzer modules can also op-
erate on any regulated 24 ±5% VDC power
source. Power consumption (wattage) is de-
pendent on the number and type of modules
connected together as a system. Wiring used
must meet the current draw requirements of
the Analyzers concerned.
Earlier versions of the Power Input Module
were factory-equipped with 115 VAC fuses (2
required). In this case, if available line voltage
is 230 VAC, replace the fuses with the acces-
sory fuses found in the shipping kit that ac-
companied the Platform. Current Platforms
are equipped with a Power Entry Module that
does not require such a fuse change.
24 Volt power wiring must be connected indi-
vidually to each Analyzer module in a star
configuration (i.e. an individual set of wires to
each Analyzer), using appropriate gauge wire
to tolerate the current draw. The ground
connection must be made to each Analyzer
module and returned to a high quality com-
mon ground point. This connection should
not be used as the power return wire.
The LON connection wiring may be made in a
daisy chain fashion. If the total length of the
LON connection exceeds a few meters, the
configuration should be restricted to a daisy
chain, with LON termination devices at each
end of the connection. Distances of less than
about ten meters are not as critical, and such
connections may be made in a star formation.
The wiring used must be level 4 LAN twisted
pair wiring, (100 ohm impedance), preferably
shielded. Standard 8 pin RJ45 telephone
plugs and jacks are used, with pins 1 and 2
carrying the signal, all others being unused.
Terminal block connections are permissible
for junction boxes, if desired.
A dual version of the Platform is available by
special order. This contains two complete
sets of Platform electronics including AC in-
put and power supply. Note that both AC
connections must be removed to disconnect
power from this unit.
The 30 A Bulk Power Supply is fac-
tory-configured for 115 VAC input. A 230
VAC version (PN 659310) is also available.
WARNING.
ELECTRICAL SHOCK HAZARD
When using the 30 A Bulk Power
Supply, use a power cord rated at 13
A, 125 V and 1625 W or better. A
cord with a lower rating may over-
heat and cause a fire hazard.
2-4 GAS REQUIREMENTS
Since gas requirements (e.g., flow rate, flow
pressure and connections) vary between the
available Analyzer modules, information con-
cerning this can be found in each Analyzer
module manual.
2-5 I/O REQUIREMENTS
Input/Output requirements (including connec-
tions) are dependent on Analyzer modules
and applications. Information concerning
these requirements can be found in the I/O
Module section of this manual.
Various adapters are available for use with
the I/O Module DB25 connector. See the
spare parts list Contact the factory for avail-
ability.
2-6 I/O MODULE
a. Installation
Remove power from all the components
of the NGA 2000 System before installing
an I/O Module.
To install an I/O Module into the Platform,
perform the following steps:
1. Remove a blank panel from one of
the unused I/O Module slots as